C# ListView: Need the string from the selected subitem

I'm making this Email Address Book, just for a little training...
I have a ListView with two columns! First one, name, second one, email address.
Now when I select an item(the name), and click a button, the subitem(mail addy), needs to be copied to another TextBox.
Anyone know how I can do this?

yourListView.SelectedItems[row_Index].SubItems[col_index].Text
// if you only want the first selected item, then replace row_index with 0.
// single selection mode listview will most likly to use 0 as the row_index